SN74ALS74AD

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop with Clear and Preset
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74ALS74AD is a versatile flip-flop IC that can store and manipulate digital data. It is widely used in various electronic devices and systems.
• Packaging/Quantity: Available in reels of 2500 units or tubes of 50 units.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Logic Family: ALS (Advanced Low-Power Schottky)
• Number of Flip-Flops: 2
• Trigger Type: Positive Edge
• Clear and Preset Inputs: Yes
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9 ns (typical)
• Output Drive Capability: ±24 mA

Detailed Pin Configuration

The SN74ALS74AD has a total of 14 pins, which are assigned specific functions as follows:

1. CLR (Clear) - Active LOW input for clearing the flip-flop.
2. D1 (Data Input 1) - Data input for the first flip-flop.
3. CP1 (Clock Pulse 1) - Clock input for the first flip-flop.
4. PR1 (Preset 1) - Active LOW input for presetting the first flip-flop.
5. Q1 (Output 1) - Output of the first flip-flop.
6. Q̅1 (Complementary Output 1) - Complementary output of the first flip-flop.
7. GND (Ground) - Ground reference for the IC.
8. Q̅2 (Complementary Output 2) - Complementary output of the second flip-flop.
9. Q2 (Output 2) - Output of the second flip-flop.
10. PR2 (Preset 2) - Active LOW input for presetting the second flip-flop.
11. CP2 (Clock Pulse 2) - Clock input for the second flip-flop.
12. D2 (Data Input 2) - Data input for the second flip-flop.
13. VCC (Supply Voltage) - Positive supply voltage for the IC.
14. CLR̅ (Complementary Clear) - Complementary input for clearing the flip-flop.

Functional Features

• Dual flip-flop design allows independent storage and manipulation of two separate data inputs.
• Positive-edge triggering ensures reliable and synchronized data capture.
• Clear and preset inputs provide additional control over the flip-flop state.
• Low power consumption due to the ALS logic family.
• Wide operating temperature range enables usage in various environments.
• High output drive capability allows direct driving of external loads.

Advantages and Disadvantages

Advantages: - Versatile and widely used in digital systems. - Dual flip-flop configuration provides flexibility in data handling. - Reliable and synchronized data capture with positive-edge triggering. - Additional control over flip-flop state with clear and preset inputs. - Low power consumption compared to other logic families. - Can operate in a wide temperature range. - Capable of driving external loads directly.

Disadvantages: - Limited number of flip-flops per IC package. - Requires careful consideration of clock timing to avoid data corruption. - May not be suitable for applications requiring high-speed operation.

Working Principles

The SN74ALS74AD is based on the positive-edge-triggered D-type flip-flop circuit. It stores digital data using two separate flip-flops, each with its own data input, clock input, clear input, and preset input. The positive-edge triggering ensures that the data is captured and stored at the rising edge of the clock signal.

The clear and preset inputs allow for additional control over the flip-flop state. When the clear input is activated (LOW), both flip-flops are reset to their initial state. Conversely, when the preset input is activated (LOW), the flip-flops are set to a predefined state.

The outputs of the flip-flops provide the stored data and its complement. These outputs can directly drive external loads due to their high output drive capability.

Detailed Application Field Plans

The SN74ALS74AD finds applications in various digital systems and electronic devices, including but not limited to:

1. Sequential Logic Circuits: Used as building blocks for counters, shift registers, and other sequential logic circuits.
2. Data Storage Systems: Employed in memory units and registers for storing and manipulating digital data.
3. Digital Communication Systems: Utilized in data transmission and reception circuits for synchronization and buffering purposes.
4. **Microcontrollers and Micro